We look at the division of 864980 by 391 
We want to figure out the number of times 864980 can be divided by 391.

Going ahead to step 1:
391 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 391

Step 2:
The number 391 fits into 86 0 times, leaving a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Grab the next digit (4) from the dividend, add it to 86, then carry on: 864 / 391

Step 3:
391 goes into 864 2 times with a remainder of 82.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 782 from 864 and we're left with 82.
Bring next digit (9) of the dividend behind the 82 and repeat the process: 829 / 391

Moving on to step 4:
391 can be fit into 829 2 times, resulting in a remainder of 47.
Write down 2 as next digit of the result. 
Result so far: 22.0
If we subtract 782 from 829, we get 47.
Bring next digit (8) of the dividend behind the 47 and repeat the process: 478 / 391

Advancing to step 5:
478 divided by 391 is 1 with a remainder of 87.
The number 1 becomes the next digit in our result. 
Result so far: 221.0
Subtract 391 from 478 to get 87.
Grab the next digit (0) from the dividend, add it to 87, then carry on: 870 / 391

Moving on to step 6:
If we divide 870 by 391, we get 2 and a remainder of 88.
The number 2 becomes the next digit in our result. 
Result so far: 2212.0
Subtract 782 from 870 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Advancing to step 7:
391 can be fit into 880 2 times, resulting in a remainder of 98.
Put 2 as the next digit of the answer. 
Result so far: 2212.2
Deduct 782 from 880 and we're left with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Going ahead to step 8:
391 goes into 980 2 times with a remainder of 198.
The number 2 becomes the next digit in our result. 
Result so far: 2212.22
The remainder is 198 after subtracting 782 from 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

After the division, we end up with 2212.22 and a remainder of 0.198.